Oil burner



Aug. 28, 1923.

G. W. coEN OIL BURNER Filed Sept. 28, 19 21 INVENTOR G/i/QNET W COEN Patented Aug. 28, 1923.

GARNET W. COM, 01 SAN FBAHCISCO, CALIFORNIA.

OIL BURNER.

Application filed September 28, 1921. Serial No. 503,727.

To all whom it may concern:

Be it known that I, GARNET W. Cor.N, a citizen of the United States, residing at the city and county of San Francisco and' State of California, have invented new and useful Improvements in Oil Burners, of

which the following is a specification.

This invention relates to oil burners, and

especially to means for-obtainin thorough atomization of the oil and a uni orm homogeneous mixture of the oil and the atomiz in medium employed.

borne fuel oil burners in use today, employing air or steam, have one serious fault, that is, being unable to maintain a homogeneous mixture-ofthe oil and the atomizing medium. Stratification of the atomized mixture before leaving the burner nozzle often occurs, causing a fire which may be heavy near the edges and. conversely entirely too light at the center. atomization of the oil, particularly during load changes when the fires are increased or decreased, is almost unobtainable and numerous other difficulties might be mentioned.

One of the objects of the present invention is to generally improve and sim lify burners of the character described, an

fication of the oil and atomizing medium will be avoided and a uniform flame obtained; further a burner in which uniform mixing of the oil and steam will take place,

and in which thorough atomization can be relied upon during all load charges.

Further objects will hereinatte-r appear.

The invention consists of the arts and the construction, combination an arrangement of parts as hereinafter more fully described and claimed. having reference to the accompanying drawings, in which Fig. 1 is a side elevation of the burner partially in section. I

. Fig. 2 is an end view of the burner nozzle.

Fig. 3 is a side elevation of the atomizing.

and mixing member em 'loyed.-

Fig. 4 is a front view 0 the member shown in. Fig. 3.

Referri g tothe drawings in detail, A indicates a fitting. On this fitting are three threaded extensions as indicated at 2, 3 and 4. Connected with the extension 2 is an oil delivery ipe not shown, and mounted interior of t e'extension 2 is a strainer 5, Con- Thorough es-' pecially to provide a burner in which strati pipe not shown, and connected with the extension 4, by means of a union coupling 6,

is a sleeve 7 in which is secured a burner pipe 8. Secured on the outer end of the pipe is a burner tip or nozzle 9, on the outer end of which is formed an elongated slot 10, and extending through the pipe 8 and the extension 4 of the housing A. is a to which oil is delivered by means 0 a passage, 12 which forms a" communication between the strainer and the inner end of the pipe. pipe 11 is a combined atomizing and mixing member B, and adapted to regulate the flow ofoil and steam are valves of suitable construction which in this instance are not shown. c.

The combined mixingand atomizing members disposed within the nozzle or burner tip 9 and is secured to the outer end of pipe 11 by any suitable means or as here shown b a threaded connection 13. The member 1s substantially cylindrical in shape and is provided with 'angularly disposed vanes 14 at one end and longitudinally disposed or straight vanes 15 at the opposite end. 1

The interior of'the burner tip 9 is provided with a cylindrical chamber 16 which that a central chamber 17, hereinafter to be termed a mixinglchamber, is formed between the vanes 14 and 15 and the burner tip.

The inner end of the member B is cored out or drilled to form a central chamber 18.

One end of this chamber is threaded to receive the threaded end 13 of the pipe 11,

while the other end of the chamber merely forms a pocket into which the oil of pi 11 discharges. Four or more radially d18- posed holes 19, of fairly small diameter, form a communication between the pocket ,18 andthe annular mixing chamber 17 and it is therefore obvious that the oil. delivered by thepipe 11 will discharge through these.

' openings.

In actual operation it is obvious that the oil delivered through the extension 2- will pipe 11 Secured on the outer end of the first ass through thestrainer 5, the passage 12 and pipe 11 before it finally enters the pocket 18 and discharges through the radially disposed openings 19. Similarly that steam admitted through the extension 3 will flow through the passage indicated at 20 and then through an annular passage 21 formed between the burner pipe 8 and the oil pipe 11, finally entering the annular mixing chamber 17 by passing through the openings 22 formed between the interspaced angularly disposed vanes 14:. A swirling movement is in this manner imparted to the steam as it enters the mixing chamber 17 and a thorough mixing of the steam and oil is obtained. Atomizing of the oil, however, takes place previous to the mixing action as the open ings 19 through which the oil discharges are disposed directly in front of the interspaced openings 22 formed between the vanes, that is the steam entering at high velocity through these openings will pass directly over the discharge ends of the openings 19, thus serving the function of jets which firstcauses an atomizing action, and then a mixing action due to the swirling movement imparted. The oil when thor oughly atomized and mixed with the steam will next discharge between the longitudinally disposed vanes 15 and will then escape through the elongated slot 10, and finally discharge into the furnace box or space i where combustion takes place.

The provision of the vanes 15 is an im portant feature of the present invention as it prevents stratification of the oil and steam within the burner tip or nozzle 9 before the mixture discharges, that is the swirling movement imparted by the vanes 14 sets up a rotary action which would cause the oil to be thrown outwardly against the inner sur face of the cylindrical portion ofthe tip .9,

thus causing more of the mixture to pass through the ends of the slot 10 than in the center, the result being an uneven fire. This condition, however, is entlrely avoided when the vanes 15 are employed as the swirling. movement and centrifugal action produced flame is obtained; second, thorough atomiZa-- tion is secured by placing the openings 19 directly in frontof the spaces formed between the vanes 14; third. thorough mixing of the steam and oil is obtained by the swirling movement and it is thus obvious that variations in load Will have no effect either upon the atomlzlng or mixing action of the burner as these actions are affected not only may be such as the experienceand judgment of the maufacturer may dictate or Varying uses may demand.

Having thus described my 1nvention,whajt I claim and desire to secure by Letters Pat- .ent is 1. In a burner of the character described, a pair of pipes, one interior of the other. one

for delivery of steam and the other oil, a v

combination atomizing and mixing member secured on the outer end of the Oil delivery pipe, vanes on the exterior surface of said member and at 'each end thereof, and interspaced with relation to each other to form a .mixing chamber, a plurality of radially disposed openings formed in the member communicating with the oil pipe and the mixing chamber, and a burner tip enclosing said member.

2. In a burner of the character described,

a'pair of pipes one interior of the other,

one for the delivery of steam and the other oil, a combination atomizing and mixing member secured on the outer end of the oil delivery pipe. said member being substantially cylindrical in shape and elongated, a plurality of interspaced angular-1y disposed vanes formed on one end of the member, a

plurality of longitudinally disposed vanes formed on the exterior surface and on the other end of said member, a burner tip enclosing the member and the vanes formed exterior thereof and engaging the outer ends of the vanes, means for securing the burner tip with relation to the steam delivery pipe, a mixing-chamber formed between the angular and the longitudinally disposed vanes, and a plurality of radially disposed openings formed in the cylindrical member and communicating withthe oil delivering pipeand the mixing chamber.

3. In a burner of thecharacter described,

a combination atomizing and mixing member, cyhndrlcal 1n shape and having, a central chamberformed thereln conniected with a source of oil supply, a plurality of' an gularly disposed vanes surrounding one end of the member, 'a plurality of longitudinally disposed vanes surrounding the other end of the member, said angular and longitudinal vanes being interspaced. to form an annular mixing chamber, radially disposed .oil discharging openings formed in the member communicating with the source of oil supply and the annular mixing chamber, and a casing surrounding the member and the respective vanesformed thereon, said casing being connected with a source of steam supply.

4:. In a burner of the character described, a combination atomi'zing and mixing member, cylindrical in shape and having a central chamber formed therein connected with a source of oil supply, a plurality of angularly disposed vanes surrounding one end of the member, a plurality of longitudinally disposed vanes-surrounding the other end of the member, said angular and longitudinal vanes being interspaced to form an annular mixing chamber, radially disposed oil discharging openings formed in the member communicating with the source of oil supply and the annular mixing chamber, a

casing surrounding the member and the re-- spective vanes formed thereon, said casing being connected with a source of steam supply. a nozzle-like projection formed on the casing, forward of the combined atomizing and mixing member, and a contracted opening formed in said nozzle-like projection.

5. The combination with the burner tip and the steam and oil delivering pipes connected with the same, of a cylindrical chamber formed within the burner tip, a cylindrical member disposed within the burner tip and having a central chamber formed therein, means for securing said cylindrical member to the end of the oil delivering pipe, a plurality of angularly disposed interspaeed vanes formed on one end of the cylindrical member, a plurality of longitudinally disposed interspaced vanes formed on the other end of the cylindrical member, said angular and longitudinal vanes being separated with relation to each other to form an annular mixing chamber between the burner nozzle, the cylindrical member and the respective vanes, the exterior ends of the respective vanes snugly engaging the inner surface of the cylindrical chamber formed within the burner nozzle, a plurality of radially disposed oil discharging openings formed in the cylindrical member and communicating with the central chamber formed therein and with the annular mixing chamber, and an elongated contracted opening formed in the forward end of the burner tip.

G. In an oil burner, the combination with the burner tip and the steam and oil delivering pipes connected therewith, of means within the burner tip for imparting a swirling movement to the steam, an annular mixing chamber formed between said means and the burner tip into which the steam discharges with a swirling movement, means for projecting oil radially into the mixing chamber, and a plurality of longitudinally disposed vanes arranged in front of the mixing chamber to direct a mixture of steam and oil in a forward direction and to correct the swirling movement imparted to the steam and oil.

, 7 'In a burner of the character described, a combined atomizing and mixing member comprisinga cylindrical shaped elongated member, a plurality of interspaced angularly disposed vanes disposed exterior thereof and on one end, a plurality of interspaced straight vanes also formed on the exterior and on the opposite end, each set of vanes entirely surrounding the member, said member also having a central chamber formed therein and :1 plurality of radially disposed discharge passages communicating with the chambensaid passages terminating attheir opposite ends, at a point intermediate tbe angular vanes andthe straight vanes.

GARNET W. COEN. 

